Jeff Squyres, le Wed 21 Apr 2010 09:04:11 -0400, a écrit :
> On Apr 21, 2010, at 8:47 AM, Bert Wesarg wrote:
> > From that page:
> > If you are writing a header file that must work when included in
> > ISO C programs, write __typeof__ instead of typeof. See Alternate
> > Keywords.
> > > Modified: trunk/src/topology.c
> > That does not look like a header for me.
> Right, but gcc complained when used with -std=c99 unless it was __typeof__. I did not check to see if icc or pgcc accepted typeof. I read that text to be "if you want portable code, use __typeof__ instead of typeof."
Err, putting underscores doesn't magically makes something recognized by
The reason why the documentation tells about headers and not .c files is
that while you control which standard your .c files are compiled under
(e.g. -std=c99), you do not control which standard your .h files will be
compiled under by other applications, that's why you need a way to tell
a compiler "don't complain about these extensions I know you support but
warn about because you were given -std=c99).
Here, typeof is not c99, and that's why gcc complains when given
-std=c99 (instead of the default -std=gnu99). Putting underscores just
hides the bug...